ROKY Softener Regeneration Calculator V5

1. System Data

Pressure Vessel Size

Resin Media Volume (L)

For best accuracy, enter the actual resin volume loaded.

Operating Flow Rate (LPH)

Recommended starting point is approximately 20 BV/h.

Select a vessel to see estimated resin loading and recommended starting flow.

Water Hardness (PPM as CaCO₃)

Daily Water Usage (L/day) optional

Advanced Accuracy Settings

Salt Dose (g NaCl/L resin)

Brine Concentration (% w/v)

Influent Sodium, Na (PPM) optional

ROKY Operational Reserve (%)

Optional sodium improves the Purolite capacity correction. If sodium is unknown, the calculator does not apply the sodium correction and the recommended capacity remains deliberately below the estimated capacity.

2. Calculation Result

ROKY Recommended Regeneration Setting

—

Enter vessel/resin volume and hardness.

Estimated Maximum Softening Capacity

—

Purolite-based estimated throughput before operational reserve.

Regeneration Interval

—

Based on recommended regeneration setting.

Salt Required

—

NaCl per regeneration.

Water for Brine Solution

—

At selected brine concentration.

Estimated Total Regeneration Water

—

Brine + backwash + slow rinse + final rinse.

Estimated Total Process Time

—

Based on a typical co-flow regeneration cycle.

Recommended Service Flow

—

20 bed volumes per hour starting point.

Flow check: —

Bed depth: —

Model check: —

Calculation basis: Purolite C100 sodium-cycle engineering performance is used as the capacity basis. A C100E adjustment is applied and the final recommended setting includes the selected ROKY operational reserve.

Safety warning: Isolate electrical power and depressurize the vessel before servicing. Use appropriate eye and hand protection when handling salt/brine. Do not mix resin or brine with strong oxidants, acids or other incompatible chemicals. Follow the resin SDS, control-valve manual and site safety procedures. Backwash settings must prevent resin loss through excessive bed expansion.

Disclaimer: This calculator provides an engineering estimate for preliminary operating and maintenance guidance. Actual performance varies with resin brand and condition, actual resin quantity, hardness composition, sodium/TDS, suspended solids, flow profile, pressure, temperature, vessel geometry, distributor design, valve programming and regeneration method. It is not a certified design, commissioning certificate, laboratory result, warranty or substitute for site verification by a competent person. The user remains responsible for confirming the settings and suitability of the system. ROKY Holdings (Pvt) Ltd. accepts no liability for loss, damage or interruption resulting from reliance on this estimate, to the extent permitted by applicable law.